Unknown; possibly carbonated water-flavoured
Bubble Juice is a magical juice. It bears a resemblance to Veritaserum, as Harry Potter once thought the truth serum that Professor Snape stored in his storeroom to be bubble juice. It is possibly flavoured like carbonated water. Snape accused Harry for stealing it. It turned out that Barty Crouch Jr. (disguised as Alastor Moody) was the real culprit.
- Harry Potter and the Goblet of Fire (film) (Mentioned only)